'Luther' and its star Idris Elba will return to TV with four new episodes, the BBC has confirmed.

Series three of the Emmy-nominated police drama will begin filming next month, and the broadcaster has made it official with a new video (above).

They promise that it will be "worth the wait" and "there will be four perfectly dark, chillingly-formed episodes."

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The video also asks the question fans want answering - will villain and Luther's best sparring partner Alice Morgan (Ruth Wilson), who's reportedly getting her own spinoff series, return? "Only Alice knows," is the answer.

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